Difference between revisions of "Resolving power (in mass spectrometry)"

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'''Resolving power (mass spectrometry)'''
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The ability to distinguish between ions differing in the quotient mass/charge by a small increment. It may be characterized by giving the peak width, measured in mass units, expressed as a function of mass, for at least two points on the peak, specifically at fifty percent and at five percent of the maximum peak height.
  
 
'''mass resolving power'''
 
'''mass resolving power'''
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Commonly and also acceptably defined in terms of the overlap (or 'valley') between two peaks. Thus for two peaks of equal height, masses  and  , when there is overlap between the two peaks to a stated percentage of either peak height (10% is recommended), then the resolving power is defined as  . The percentage overlap (or 'valley') concerned must always be stated.
 
Commonly and also acceptably defined in terms of the overlap (or 'valley') between two peaks. Thus for two peaks of equal height, masses  and  , when there is overlap between the two peaks to a stated percentage of either peak height (10% is recommended), then the resolving power is defined as  . The percentage overlap (or 'valley') concerned must always be stated.

Revision as of 19:45, 30 July 2010